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🧷 문제 링크
https://www.acmicpc.net/problem/2143
🧭 풀이 시간
40분
👀 체감 난이도
✏️ 문제 설명
두 배열이 있다.
각각의 배열에서 부분 배열의 합을 서로 합친 것이 T가 되는 경우의 수를 출력.
🔍 풀이 방법
누적합, 맵
부분 배열의 합을 저장해두는 dp 배열을 만들고 T - 부분 배열의 합 꼴의 개수를 맵에 저장해둠. 다른 배열에서 이 값과 동일한 값이 나오는 경우 이 값의 개수를 전체 카운트에 더함.
⏳ 회고
dp라고 했는데 어차피 필요한건 부분 배열의 합이라서 그냥 sum이라고 변수 하나 만든담에 for문을 다르게 돌았으면 메모리 공간을 줄였을 수 있을듯.